Problem-solving: Troubleshooting and Replacement of Faulty pH and Redox Probes

Client:
Hello, I have a problem with my probe. I can only find the pH probe, but I need a Redox probe.

Technical Advisor:
Which controller do you have?

Client:
I have a VA salt smart. It is currently showing a value of 2mV, which is incorrect. The pH reading is showing 6.5, which is also wrong, as I measured externally and found it to be 9.8.

Technical Advisor:
Yes, the Redox sensor is defective. Here is a link to check if your pH probe is defective: https://ph-redox-pool.com/gb/content/16-ma-sonde-ph-est-elle-hors-service-